Top 10 comedies!

I advise if you like a film, buy it, so that the people who make that film and put effort into making something genuinely good get the money that they deserve.

And after that advise i would say the following comedies are great and you should buy them:

Monty Python and the holy grail

Monty Python's Life of Brian

Annie Hall

Manhattan

Edit: I just read you said films.

In that case i dunno 

5. Shaun of the Dead

4. Monty Python and the Holy Grail

3. Thank You for Smoking

2. Hot Fuzz

1. Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb.  

in no particular order;

- Shawn of the Dead

- Hot Fuzz

- Monty Pythin and the Holy Grail

- Trains Planes and Automobiles

-  Waynes world 1, and 2

- Under Cover Brother

- King Fu Hustle

- Scary Movie 2

those are some of the best ones i can think of 

Airplane!

Shaun of the dead

Wayne's World

Zoolander

Dude where's my car/

Galaxy Quest

(that's close enough to 10)